Raman Spectroscopy

Co-localized Raman/AFM enables identification of epitaxial graphene layer number using 2D band FWHM and KPFM

Raman spectroscopy probes the vibrational modes of a material. This information is unique to chemical composition, the samples environment, phase, strain, orientation, and defects among many other factors.

If you would like to learn more about how Raman works, please visit the Raman Academy home page.

Sample Type

  • All except for samples with pure metallic bonding

Technique Advantages

  • Non-destructive acquisition of chemical bonding information
  • Mapping of chemical information from 10s of nm (TERS) to a few mm in X, Y and Z direction possible
  • Simultaneously acquire topographical information (AFM) and chemical information (Raman/PL)

Sample Requirements

  • Raman/PL measurements can be performed for Solids, Liquids and Gases
  • Typical sample size is 100s of nm to 100s of µm, however we have sampling accessories that allow us to probe down to 10s of nm and up to ~1 m.
  • Additional sample requirements vary widely depending upon the specific technique employed for analysis.



  • Linkam Temperature/Environmental Stage (-196 to 550°C)
  • Macro-Cuvette Holder
  • Signatone High Resolution Positioners